I also need more range with the car, it is annoying to stop at gas station after 250 km, especially when I drive fast it is after a little more than an hour… 70 l fuel tank is ridiculous, my land Rover has 80 l, but it consumes only 10l/100 km…so I will have another fuel tank. Outside observers were incredulous, particularly since the bigger engine was plainly more powerful than the smaller version. GM unfortunately hasn’t yet digitized its vehicle information guides for Pontiac, so I don’t have an official word for you in that regard. I don’t know what state you’re in, but it sounds like they’re using the old Royal Auto Club taxable horsepower formula. 0000031995 00000 n For instance, for non-performance V-8s of the sixties, the gross power peak might be at least 400–600 rpm higher than the engine would willingly pull when installed in a car, and if you tried it, it would be pretty clear that you were getting more complaints than power at that speed. What is th HP from the factory? Note: The ICAO I saw a spec that rated the 1968 302 at 235hp (gross) and I know the 1992 5.0 was rated at 225 net (although I read and respect your notation that Ford may have exaggerated by 20hp or so) . The LM-1 was not offered before ’74, so there are no published gross ratings for it. 8-9; Bernard Cahier, “Road Test/10-63: Mercedes-Benz 230 SL,” Sports Car Graphic May 1963, reprinted in Mercedes 230SL – 250SL – 280SL Ultimate Portfolio 1963-1971, pp. See my reply to your earlier comment above. Ca. (assuming a standard tune). I suppose if Jaguar had really wanted to have a V-8, they might have been better off starting from a 90-degree V-8 and making a 90-degree V-12 from it rather than the reverse. R.M. However, you’d have no way to determine from that what the advertised gross output was. I am trying to wake this sleeping beauty (or Pipe smoking granny as my friends call it). 0000008146 00000 n My stock compression was what? The LS7 will idle smoothly and pull from low engine speeds in a higher gear, which isn’t something with which the L88 was designed to cope artfully. Thank you Aaron for a well-researched article. (The latter might be attributable to different exhaust packaging, but the 20 hp difference on the 2V engine is very curious indeed.). The problem is that difference between gross ratings and as-installed power can vary enormously from engine to engine; there is no consistent formula for estimating the relationship between gross and as-installed output. Apparently the 2.8-litre XK6 was originally envisaged as a 2.6-litre in combination with the 3.0-litre XK6 for the XJ, prior to the 3-litre being dropped and the 2.6-litre being enlarged to 2.8-litres. It was a reminder that engine commonality isn’t always a benefit! The transmissions in those days ate up as much as 60 horsepower (turbo 400) and as little as 40 horsepower(turbo 250-350)so the larger engines would show a bigger drop in power on paper. For more information about how Vimeo uses the information they collect, see the Vimeo Privacy Policy. * For more information on Race Logic or vBox devices, visit pump,air conditioning compressor,replaced the fan with light weight aluminum fan,put weaker springs in the distributor,high performance module,high voltage coil.And i have all the power i’ll ever need.Simple modifications. The Boss 429 was pretty explicitly a NASCAR engine — it was only offered in the Mustang because Ford needed to sell the requisite number of engines (in anything) to meet NASCAR homologation requirements. For in-depth technical details, see my web page on Why would a manufacturer underrate their engines? If the payment button is visible, it may set the third-party cookies PYPF (via paypalobjects.com), which appears to check whether or not you are a logged-in PayPal user and is probably used to facilitate the PayPal user login process, and/or 01A1 (via abmr.net), which stores certain technical information about your device and browser, probably to facilitate the login and shopping cart functions. The atmospheric pressure, temperature and humidity all affect The engine mentioned in your article has a fixed compression ratio. The catalyzed engines were mainly for California, which had tougher emissions standards than the national requirements. I think a few states still use the RAC formula to calculate annual road tax and that practice was more common when your truck was new, so it wasn’t uncommon for the spec sheet to list the taxable horsepower figure. I saw sticker prices and option lists on delivered L-88 corvettes in 1968 and the horsepower rating on the factory sticker for the L-88 option was 625 horsepower. SAE J1349. For instance, turbocharged cars in those days would often lose a second or more compared to their 0–60 times, making clear that the latter were obtained by very aggressive clutch-dropping launches that you probably wouldn’t want to do often with a car you were relying on to get you to work on time. Starting in 1970 i owned a service station,till 1978. I had owned a 66 GTO and a 67 396 chevell. I tested the top speed on the Autobahn because, why not – but it gets kind of scary past 180 km/h, the whole car shakes, noise is horrible, and I have a feeling at about 200 km/h that the steering wheel is gonna fall off, lol. Summary, Graphs, Google Earth? Click here to request a quote. I totally agree that the Lincoln would pull away after about 50 MPH. Gross and net power and torque peaks sometimes occur at the same rpm, but that isn’t always the case. 81.1% of the rated horsepower. There were multiple Oldsmobile 455 engines available in 1972. an extremely wide range, but rather that the intended range of air changes. Commenting signifies your acceptance of our Comment Policy — please read it first! This is a 1966 Chevrolet Corvette Sting Ray’s 427 cu. If they were actually incorrect (for example, if the department of motor vehicles thought your Galaxie had the bigger 428 engine, which would have a RAC rating of 55 HP, instead of the 289), you could probably get them to fix that, but the ratings aren’t [i]wrong[/i], they just don’t have anything to do with the output of the two engines. Based on the 340’s performance in stock (not drag-prepped) condition, I think the 275 hp rating is a probably a reasonable approximation of the stock engine’s *net* horsepower. what is with that. 0000006885 00000 n 1999), pp. 0000002854 00000 n If you know your engine produces 286 lb-ft of torque at 5,500 rpm, you also know that it has about 300 hp at that speed. The 2.8-liter XK didn’t do terribly well in the XJ6 either, but it at least wasn’t quite so dear. They normally expire after about one year. I assume the “CAR” lettering indicates that the whatever vehicle the engine was originally built to power was a passenger car and not a truck. (The concern with the Six Pack is that the linkage is vacuum-controlled rather than mechanical, so you sometimes get all three carburetors whether you want them or not.). Guys… These cars would kill the 70 LS1 Chevelle – hands down for 30k present money (on the mustang) Pony up (and bucks down) and drive real muscle cars of this era. (This is not to be confused with engines of the ’50s that did have slightly more power in automatic form to help account for the losses of early automatics. The Mustang, with a lower HP 5.0 liter is still the fastest of all 3 because of the wt/hp ratio. R.M. R.M. On a dyno, the difference between SAE net ratings and drive-wheel power was readily apparent. Please note, I’m not necessarily disagreeing with you that the ’72 engines were less powerful, I’m just saying the figures Cadillac quoted in its official specifications for power, torque, and compression were the same as in 1971. I have 66 Corvette with a 327/300HP, 600cfm Holley, close ratio 4 speed and 3:08 posi. I assume your Charger has the 5.7 liter Hemi, which has a bore of 3.92 inches, giving it a RAC horsepower rating of 49.17, which rounds down to 49. This allows better volumetric efficiency (better breathing) in their engines and more horsepower. Plane Jane. I appreciate it! �[aX�4��+����x�M���|͊�:�r�����"��R��'�(�(#�N-M��Ev�U�G�~��±�. .H���ό�2����Α�����v��ߗ)7��!I��HQ����ѐ�ʘz��M����@�b����"��=ɤR[aϴ��$-qm�V���م][�p�i8�h�ebT-vI>�\%�v0tP There is an additional complication when considering non-U.S. power ratings: the question of units. Roll your pointer to the left of the table to see typical values. FPM for Helical Gears or Nonmetallic Spur gears. Surprisingly, several sources indicate that in 1975, California-bound Lincolns had the catalytic converter and dual exhausts, with more power rather than less. Developed horsepower is a mathematical function of engine torque and engine speed. because the dew point is fairly constant for a given air mass I owned a 1950 1 ton GMC with 270 CID straight 6. (YouTube, Google Videos, and DoubleClick are trademarks of Google LLC. Not true. With todays better tires the above cars would run with the new cars, except for some of the European million dollar rides. This Relative Horsepower Calculator determines the relative torque and horsepower available at any temperature, barometric pressure, humidity, and altitude. I was informed by the dealer two weeks later that I could not get the L48 engine with the manual trans and I had to either go 4 speed or automatic.I went auto for insurance reasons but the car came in with the L65 2 bbl instead. When you submit a comment, you may have the option save your information for future comments, storing the info in these cookies. I.E., higher compression ratio engines can extract MORE heat from a gallon of gasoline because they can WITHSTAND the increased compression ratio due to the “anti-knock” characteristic of high octane gasoline, NOT the implied fact that high octane gasoline has more heat (HP) in it. ), These functionality cookies are used to manage user logins and other WordPress administrative functions, such as post editing. Note: The calculator will not work because Javascript is not enabled in your web browser. ���S�����W �i=���mqm[�G����+�聾����j��A1bQ%H]z����pDٮ��$�ìe������0j�� Me��L�e�������Z��Ut�7u�eR�T�"bk���H����>skڬ:�0S��k� ���G���(�U�|PR?�J���Ds���7}�+h:컡/��)�ߙ�G��A�����P���uV��D����S��M�)T��o�������� ��7V endstream endobj 25 0 obj << /Filter /FlateDecode /Length 208 >> stream I would therefore guess that the high-compression engine would probably have a net rating of something in the realm of 265–275 hp. So, just based on that, I’d say it’s entirely plausible that the Bel Air’s low-end torque would put it in the lead at lower speeds, even if peak horsepower is 80-90 hp less. There are different formulas to figure out the amount of horsepower your engine is making. in. the relative humidity varies greatly as the ambient temperature For example, the mammoth 500 cu. Guestimated Horsepower 253hp at the crank This conversion utility was jointly developed between FrozenMist and www.mk5cortinaestate.co.uk to aid you in … That could conceivably compound your aerodynamic woes, resulting in momentary deflection steer from the rubber bits in the suspension as the car batters its way through the air. There are many different standards and types of horsepower. 225 was the base 455 with single exhaust, and 250 was with dual, if I’m not mistaken. Some of our specific references included (but were not limited to) Robert Ackerson, Chrysler 300 ‘America’s Most Powerful Car’ (Godmanstone, England: Veloce Publishing Plc., 1996); “Alfa Super Spider,” Road & Track October 1959, reprinted in Road & Track on Alfa Romeo 1949-1963, ed. I already knew the difference between HP gross and HP net but it is important to remember! I have always felt the 1970 Cutlas was a guttsier performer, however this is by the seat of my pants and a long time ago. Naturally, the net output of a given engine is somewhat lower than the gross output.
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